The Hunchbacks of Venice
You don't have to wander around Venice's dark and narrow streets for long before noticing that many of the corners are filled in with stone or brick, or fitted with sloping stone shelves.
A painting of a cross was often added as an additional deterrent.
It is easy to guess why they were called pissotte; gobbe antibandito translates roughly as hunchbacks against thieves.
We see an offender in action in Canaletto's painting of Rio dei Mendicanti.